I personally use a 3x6 Corne for non-gaming tasks. I would recommend it for anyone that uses a keyboard for more than a few hours a day to preemptively reduce the risk of RSI, especially programmers. The small layout and tenting reduce wrist and finger strain significantly, to the point where when I have to use a regular keyboard at work I can quickly notice the pain in my right pinky. If you want something with curved key wells the Dactyl Cygnus is a Corne-like option. I haven’t bothered to try anything smaller since I don’t see the point (for non-steno), as all keys on a 3x6 are within 1u of the home row.